html,
body {
  margin: 0;
  padding: 0;
}
canvas {
  display: block;
}

#open-new {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 1.5rem;
  color: #ffffff;
  text-decoration: none;
  z-index: 1000;
  cursor: pointer;
  user-select: none;
  background: rgba(86, 23, 211, 0.8);
  padding: 0.2em 0.5em;
  border-radius: 4px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

#open-new:hover {
  color: #000;
}